Is it really so hard?

don’t sit in front of your vocabulary trying to memorize. While studying words walk, jump, do the dishes,etc.

have a paper dictionary not just online ones. It makes your brain work harder.

complete vocabulary games, crosswords made for you (this website is made for this)

try to form stupid, but correct sentences with your new words

revise your old ones sometimes eg. by using them in your sentences

don’t learn grammatical rules if you don’t want to be a linguist, but try to understand them, and use them for a situation in your own life

And the most important of all: READ a lot, LISTEN to your favourite songs with lyrics and WATCH your favourite series, movies with English subtitle having a dictionary in your hand. You will be proud of yourself, you’ll see.